"Changing" branches actually merges the new branch into the current one

[nfriedly]

I have a site that uses this plugin and I recently tried to build from an alternate branch of the cloned repo. Everything appeared to work on my laptop, but failed with an error about configuring my git username and password when I tried it on my server.

When I dug in, I noticed that the underlying safeps plugin was actually merging the new branch into the current one. I filed a ticket there: bevry/safeps#7 but I thought it would make sense to have one here as well.